【正文】 the same datum as early and as frequently as possibleIII interreference principle（互為基準(zhǔn)）especially used for the high accuracy of relative positions of the surfacesIV selfreference principle（自為基準(zhǔn)) for sequence of small roughness, small and even allowance V clampingfacilitating/convenient principle（便于裝夾）for proper and secure (reliable) locating, simple structure of the clamping device with easy operationEconomic accuracy in machining (經(jīng)濟(jì)加工精度)Under the mon machining conditions , that is , with facilities and tooling in standard quality, the operators with typical skills, and in rated time ,the machining is done with the relevant accuracy and roughness imparted to the ponent. Such accuracy and roughness is called the economic accuracy in machining Order of sequences（工序順序安排）a datum first then others。 Fixed/floating conic pin（固定/ 浮動(dòng)錐銷）。 V block（形塊）Short V block （短形塊）。 Cut pin/rhombus pin（削邊銷/菱形銷）。 Supporting plate（支撐板）。 in reality, it is something different with its three dimensions. The following are monly used in workshops.Button locator(支撐釘)。(確定）? Station: In an installation, by using the indexing or moving device the work is changed its position relatively to the cutting tool. All the tasks done for the work in one machining position in an installation is termed as the station。1 / 9制造技術(shù)基礎(chǔ)復(fù)習(xí)基本概念、基本原理英語表達(dá)參考Review the Basic Concepts and Principles of Fundamentals of Manufacturing Technology in EnglishCHAPTER ONE DESIGN FOR MECHANICAL PROCESS PLANNINGSection 1 Basic concepts? Production procedure of mechanical products? Process procedure of machiningElements of Process procedure of machining 1 sequence 工序；2 installation 安裝；3 station 工位；4 step 工步； 5 pass 走刀? Sequence: process procedure that consists of several sequences during which workers operate on the works continuously in the same place。(操作者、加工地、工作對(duì)象——人為劃分，相對(duì)可變)? Installation: in a sequence if the work is required to put into position and clamp several times,the part of sequence done in one positioning and clamping is called an installation。(確定）? Step：In one station if the surface cut, cutting tool, velocity, and feed remain unchanged, these working contents are thought of as the step.(加工表面、刀具、切削速度、進(jìn)給量任一改變均為另一工步）? Pass: When the surface of the work is cut for any one time ,such task carried out is named as the pass? (刀具在加工表面的每一次切削）? Processing system: ? a system that contains the work to be machined, fixture that holds the work in the proper position, cutting tool that machines the work directly, and machine tool that gives the power and provide the movements to acplish the processing. In recent years the gauging and measuring is added to the system.Relationship between the batch and the pattern of productionNprogram of production, Qannual turnout of the productnnumber of the ponents a year, (1%)N=Qn???bFA2 / 9 share rate, waste rate, F annual working days, A number of days for inventory, number of ponents in a lotA Program of production In a period of planning, the turnout of product and schedule to be fulfilled is called program. (計(jì)劃期的產(chǎn)量加進(jìn)度=生產(chǎn)綱領(lǐng)）The turnout in one year planning is named the annual program .B Batch of production At a time, the number of identical products to be put into production or to be produced is termed as batch of production.(一次投入生產(chǎn)的同一產(chǎn)品的數(shù)量=生產(chǎn)批量）Process planning for machining operations :stipulated document for technological process (機(jī)械加工工藝規(guī)程：以工藝文件形式規(guī)定的機(jī)械加工工藝過程)Patterns of the process planning for machining Generally speaking, the process planning for machining appears in the form of sheet or card with the same basic content in three patterns:Pattern A: sheet of process procedures(工藝過程卡), a very simple and concise document, usually for single/small batch productionPattern B: sheet of process operation (機(jī)械加工工藝卡), often for batch productionPattern C: sheet of process sequence (機(jī)械加工工序卡), with detailed and plete contents, frequently for massive productionSection 2 Location and Datum of the work in machiningInstallation and clamping(裝夾）: concerning about the ways in which the work is installed and clamped in the fixture or on the machine tool, including two aspects, locating(定位) and clamping(夾緊).Locating: the procedure during which the work gains its proper position in the fixture or on the machine tool.Clamping: when the workpiece has gained its correct position in the fixture, it will be subject to the external forces while being machined. So, to hold or keep the workpiece in the correct position is definitely required, which is called clamping.SixPoint Locating Principles：A cuboid is in cartesian coordinate with six degrees of freedom The six degrees of free